EXHAUST EMISSION CONTROL DEVICE OF ON-VEHICLE DIESEL ENGINE

摘要

PPROBLEM TO BE SOLVED: To provide an exhaust emission control device of an on-vehicle diesel engine in which lubricating oil dilution due to regenerating treatment is suppressed while suitably removing, by burning, the particulate matters deposited on a filter by the regenerating treatment. PSOLUTION: An oxidation catalyst 41 and a filter 42 on its downstream side for collecting the PM are disposed in the exhaust gas passage 30 of a diesel engine 10. The filter is positioned on the downstream side of the oxidation catalyst. An electronic control device 50 performs an automatic regenerating treatment for burning the PM deposited on the filter 42 by oxidizing the fuel injected by a post injection by the oxidation catalyst 41 when the deposited amount of PM is estimated to be equal to or higher than a predetermined amount. Under the condition that a vehicle is stopped, a manual regenerating treatment is performed when a regeneration treating switch 70 is turned on. A warning lamp 71 for prompting a driver to perform the manual regenerating treatment is attached to the instrument panel of the vehicle. The electronic control device 50 turns on the warning lamp 71 when the degree of the dilution of a lubricating oil is estimated to be relatively large. PCOPYRIGHT: (C)2008,JPO&INPIT